CN110318677B - Dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device - Google Patents
Dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device Download PDFInfo
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- CN110318677B CN110318677B CN201910720828.7A CN201910720828A CN110318677B CN 110318677 B CN110318677 B CN 110318677B CN 201910720828 A CN201910720828 A CN 201910720828A CN 110318677 B CN110318677 B CN 110318677B
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- hole hammer
- water jet
- channel
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- 239000011435 rock Substances 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 238000005553 drilling Methods 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Abstract
The high-energy hydraulic down-the-hole hammer jetting reaming device for dry hot rock belongs to the technical field of drilling tools for dry hot rock, and comprises an outer tube, an elastic retainer ring, a nozzle, a water jet channel, a nozzle sleeve, a down-the-hole hammer flow channel, a valve seat, a spring and a steel ball, wherein the upper end of the outer tube is connected with a drill rod through threads, the lower end of the outer tube is connected with the hydraulic down-the-hole hammer through threads, the steel ball is used for controlling the water jet channel and the down-the-hole hammer flow channel to switch, the steel ball is not placed in the down-the-hole hammer flow channel during drilling operation, the drill rod, the outer tube and the central flow channel of the hydraulic down-the-hole hammer are mutually communicated, the water flow of the water jet channel is blocked by the upper part of the valve seat, when the drilling is completed and a new down-the down-hole hammer bit is needed to be replaced, the steel ball is placed in the down-hole hammer flow channel is closed, the water jet flow channel is opened, and drilling fluid forms water jet broken hole wall rock through the nozzle, so that reaming operation is realized. The invention finishes reaming operation while lifting the drill, saves time cost and drilling cost, and improves the drilling efficiency of dry hot rock.
Description
Technical Field
The invention relates to the technical field of dry-hot rock drilling tools, in particular to a high-energy hydraulic down-the-hole hammer jet reaming device for dry-hot rock.
Background
Geothermal energy is a clean energy source with wide distribution, abundant reserves, reproducibility, no pollution and great development potential. More geothermal energy is stored in the high temperature rock mass without or with little water in the ground than in the hydro-thermal geothermal resource to form the dry thermal rock geothermal resource. Meanwhile, because geothermal resources are hidden in the dry hot rock, research on related dry hot rock drilling development technologies is crucial to geothermal resource development.
Because the dry-hot rock stratum is usually igneous rock, the dry-hot rock stratum has the characteristics of deep burial, poor drillability, strong abrasiveness and the like, and therefore, drilling is a key link for developing the dry-hot rock. At present, in the development process of the dry-hot rock, the drilling cost accounts for about 70% of the total cost. The excessive drilling cost and the longer drilling period severely restrict the large-scale development and utilization of the dry hot rock.
When drilling dry hot rock with strong abrasive properties using down-the-hole hammers, the buttons of the down-the-hole hammer bit gradually wear out and fail, wherein the actual drilling diameter is reduced, smaller than the diameter of the new down-the-hole hammer bit, due to the shortened abrasion of the buttons. The new down-the-hole hammer bit is usually replaced by lifting the drill and then the roller bit is firstly put into the hole to be reamed, so that the consistent drilling diameter is ensured, and the new down-the-hole hammer bit can be smoothly put into the hole bottom. However, when the roller bit is used for reaming, the operations of reaming and lifting the drill bit are needed, and particularly for deep hole drilling, a great deal of time cost, labor cost and financial cost are needed for each time of reaming and lifting the drill bit, so that the drilling cost is increased, and the drilling efficiency is reduced.
Disclosure of Invention
The invention aims to solve the problems that in the existing dry hot rock drilling process, a roller bit needs to be put into a hole-drilling bit for reaming after a new down-the-hole hammer bit is replaced each time, so that the dry hot rock drilling cost is increased and the drilling efficiency is low.
The technical scheme adopted by the invention for achieving the purpose is as follows: the utility model provides a dry hot rock high energy hydraulic down-the-hole hammer sprays reaming device which characterized in that includes: the hydraulic down-the-hole hammer comprises an outer tube, an elastic retainer ring, a nozzle, a water jet channel, a nozzle sleeve, a down-the-hole hammer flow channel, a valve seat, a spring and a steel ball, wherein the upper end of the outer tube is connected with a drill rod through threads; the central axis of the water jet channel coincides with the central axis of the threaded hole, the water jet channel and the threaded hole are arranged obliquely upwards, and the included angle between the central axes of the water jet channel and the threaded hole and the central axis of the outer tube is 20-80 degrees; the nozzle sleeve is fixedly arranged in the threaded hole through threaded connection, the nozzle sleeve and the threaded hole are coaxially arranged, and a conical spray hole with the sectional area gradually increased along the water flow direction is formed in the nozzle sleeve; the nozzle is arranged in the nozzle sleeve, the nozzle and the nozzle sleeve are coaxially arranged, and an inner channel of the nozzle, the water jet channel and the conical spray hole arranged on the nozzle sleeve are mutually communicated; the spring is arranged in the central liquid flow channel of the outer tube, and the lower end of the spring is abutted against an inner shoulder positioned at the lower part of the outer tube; the elastic retainer ring is arranged at the upper part of the side wall of the outer tube central liquid flow channel; the valve seat is arranged in the outer tube central liquid flow channel, the bottom end surface of the valve seat is contacted with the upper end surface of the spring, a down-the-hole hammer liquid flow channel which axially penetrates through the valve seat is arranged in the valve seat, the down-the-hole hammer liquid flow channel is of a variable diameter structure and is divided into three sections along the drilling fluid flow direction down-the-hole hammer liquid flow channel, the first section is a cylindrical channel with the inner diameter larger than the diameter of the steel ball, the second section is a conical frustum-shaped channel with the inner diameter gradually reduced along the drilling fluid flow direction, the third section is a cylindrical channel with the inner diameter smaller than the diameter of the steel ball,
the steel ball is used for controlling the switch of the water jet channel and the down-the-hole hammer flow channel, when the steel ball is not placed in the down-the-hole hammer flow channel, the upper end surface of the valve seat is propped against the elastic retaining ring, the drill rod, the outer tube and the central flow channel of the hydraulic down-the-hole hammer are communicated with each other, the water jet channel is blocked at the upper part of the valve seat, and the water jet channel is closed;
the steel ball is placed in the down-the-hole hammer flow channel, the down-the-hole hammer flow channel is closed, and the water jet flow channel is opened.
Further, the number of the water jet channels and the threaded holes is at least three, and the water jet channels and the threaded holes are uniformly distributed at intervals around the central axis of the outer tube.
Further, an external thread is arranged on the outer side of the nozzle sleeve, and a threaded hole in the wall of the outer pipe is an internal thread matched with the external thread.
Further, a sealing ring is arranged between the nozzle and the nozzle sleeve.
Further, a shrinkage accelerating section and a stable jet section are formed in the nozzle, and the shrinkage accelerating section is provided with a conical hole with gradually reduced sectional area along the water jet direction.
Further, the distance between the spray hole of the nozzle and the rock of the well wall is 5-15 mm.
Further, the initial velocity of the water jet outlet of the nozzle is 50m/s to 150m/s.
Further, an annular seal ring is respectively arranged at the upper part and the lower part outside the valve seat.
Further, the hole of screw hole is the stairstepping structure, and nozzle cover inner wall is the stairstepping structure, and nozzle cover all have interior terminal surface and outer terminal surface, and be close to the outer tube central axis for the interior terminal surface, the outer terminal surface of nozzle pushes up on the shoulder in the nozzle cover, and the interior terminal surface of nozzle pushes up on the shoulder in the screw hole, and the outer terminal surface of nozzle cover is equipped with interior hexagonal hole.
Through the design scheme, the invention has the following beneficial effects:
1. compared with the conventional cone bit reaming, the invention reduces one-time tripping reaming operation and drilling lifting operation for each replacement of the down-the-hole hammer bit, particularly for deep well and ultra-deep well drilling, saves a great amount of time cost and drilling cost, and improves the drilling efficiency of dry hot rock.
2. The invention adopts a ball throwing mode to control the switch of the water jet channel and the down-the-hole hammer flow channel, when the steel ball is not thrown in, the down-the-hole hammer flow channel is opened, the water jet channel is closed, and the down-the-hole hammer normally drills; when the drill bit is required to be lifted and replaced, the steel ball is put into the central flow channel of the drill rod, the steel ball is clamped in the flow channel of the down-the-hole hammer, the flow channel of the down-the-hole hammer is closed, the down-the-hole hammer stops working, and the water jet channel is opened, so that the drill bit can be lifted and the hole can be reamed at the same time; the whole structure is reliable and the operation is simple.
3. The water jet reaming operation can realize the rock breaking target by using clear water or filtered drilling fluid without additionally matching special drilling fluid, and has certain economic and simple advantages.
4. The included angle between the central axis of the threaded hole for installing the nozzle sleeve and the central axis of the outer pipe is 20-80 degrees, the central axes of the threaded hole, the nozzle sleeve and the nozzle are coincident, the nozzle of the water jet is installed in an upward inclined mode, and the upward return of rock debris carried by drilling fluid through the annular gap between the outer pipe and the well wall after jet rock breaking is facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a undue limitation of the invention, in which:
FIG. 1 is a cross-sectional view of a structure of a dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device.
Fig. 2 is a sectional view of the structure of the device for jetting and reaming a steel ball by using the high-energy hydraulic down-the-hole hammer for dry and hot rock.
The figures are marked as follows: 1-an outer tube; 2-elastic check rings; 3-nozzles; 4-water jet channel; 5-a nozzle sleeve; 6-down-the-hole hammer flow channel; 7-a sealing ring; 8-valve seat; 9-a spring; 10-steel ball.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments and the accompanying drawings. Those skilled in the art will appreciate that. The following detailed description is illustrative and not restrictive, and should not be taken as limiting the scope of the invention.
As shown in fig. 1 and 2, the high-energy hydraulic down-the-hole hammer jetting reaming device for dry and hot rock comprises an outer tube 1, an elastic retainer ring 2, a nozzle 3, a water jet channel 4, a nozzle sleeve 5, a down-the-hole hammer flow channel 6, a sealing ring 7, a valve seat 8, a spring 9 and a steel ball 10, wherein the upper end of the outer tube 1 is in threaded connection with a drill rod, the lower end of the outer tube 1 is in threaded connection with a hydraulic down-the-hole hammer, the outer tube 1, the drill rod and the hydraulic down-the-hole hammer are coaxially arranged, when the steel ball 10 is not thrown into, the drill rod, the outer tube 1 and the central flow channel of the hydraulic down-the-hole hammer are mutually communicated, the inner side wall of the outer tube 1 is in a stepped structure, and a water jet channel 4 and a threaded hole communicated with the water jet channel 4 and used for installing the nozzle sleeve 5 are arranged in the upper tube wall of the outer tube 1; the central axis of the water jet channel 4 coincides with the central axis of the threaded hole, the water jet channel 4 and the threaded hole are obliquely arranged upwards, the included angles between the central axes of the water jet channel 4 and the threaded hole and the central axis of the outer tube 1 are 20-80 degrees, the number of the water jet channel 4 and the threaded hole is at least three, and the water jet channel 4 and the threaded hole are uniformly distributed at intervals around the central axis of the outer tube 1; the inner hole of the threaded hole is of a stepped structure; the nozzle sleeve 5 is fixedly arranged in the threaded hole through threaded connection, the nozzle sleeve 5 and the threaded hole are coaxially arranged, and the inner wall of the nozzle sleeve 5 is of a stepped structure; the nozzle 3 is arranged in the nozzle sleeve 5, the nozzle 3 and the nozzle sleeve 5 are coaxially arranged, the nozzle 3 and the nozzle sleeve 5 are sealed by a sealing ring, a shrinkage accelerating section and a stable jet section are formed in the nozzle 3, the shrinkage accelerating section is provided with a conical hole with gradually reduced sectional area along the water jet direction and used for accelerating and guiding liquid flow to the stable jet section, the distance between a jet hole of the nozzle 3 and rock of a well wall is 5-15 mm, the annular gap between the outer pipe 1 and the well wall is increased as much as possible while the effective reaming length of jet is ensured to be greater than the maximum wearing length of a side tooth by 1.5mm, the abrasion of the outer pipe 1 is reduced or avoided, the water jet outlet initial speed of the nozzle 3 is 50 m/s-150 m/s for ensuring the water jet crushed rock depth to be greater than 1.5mm, the nozzle 3 and the nozzle sleeve 5 are provided with an inner end face and an outer end face which is close to the central axis of the outer pipe 1, the outer end face of the nozzle 3 is propped against the inner shoulder of the nozzle sleeve 5, the inner end face of the nozzle 3 is propped against the inner hole shoulder of the threaded hole, the outer end face of the nozzle sleeve 5 is provided with an inner hexagonal hole for unloading the inner hexagonal hole, and the inner hexagonal hole is used for screwing down the nozzle sleeve 5, and the conical cross section of the nozzle sleeve 5 is gradually arranged along the direction of the water jet channel 4, and the nozzle sleeve is communicated with the water jet channel 4, and the nozzle sleeve is positioned in the conical passage 4 is communicated with the inner end channel, and the nozzle sleeve is arranged on the nozzle sleeve 5, and the nozzle sleeve is provided with the nozzle 4, and the nozzle sleeve, the nozzle hole and the nozzle has the nozzle hole; the spring 9 is arranged in the central liquid flow channel of the outer tube 1, and the lower end of the spring 9 is abutted against an inner shoulder positioned at the lower part of the outer tube 1; the elastic retainer ring 2 is arranged at the upper part of the side wall of the central liquid flow channel of the outer tube 1; the valve seat 8 is arranged in a central liquid flow channel of the outer pipe 1, the bottom end surface of the valve seat 8 is in contact with the upper end surface of the spring 9, a down-the-hole hammer liquid flow channel 6 penetrating along the axial direction of the valve seat 8 is arranged in the valve seat 8, the down-hole hammer liquid flow channel 6 is of a variable diameter structure, the down-the-hole hammer liquid flow channel 6 is divided into three sections along drilling liquid flow, the first section is a cylindrical channel with the inner diameter larger than the diameter of the steel ball 10, the second section is a conical platform-shaped channel with the gradually reduced inner diameter along the drilling liquid flow direction, the third section is a cylindrical channel with the inner diameter smaller than the diameter of the steel ball 10, the steel ball 10 is used for controlling the switching of the water jet channel 4 and the down-hole hammer liquid flow channel 6, when the steel ball 10 is not arranged in the down-hole hammer liquid flow channel 6, the upper end surface of the valve seat 8 is propped against the circlip 2, the drill rod, the outer pipe 1 and the central liquid flow channel of the hydraulic down-hole hammer are mutually communicated, the water flow of the water jet channel 4 is blocked by the upper part of the valve seat 8, the water jet channel 4 is closed, the elastic retainer 2 is used for preventing the valve seat 8 from being popped up under the action of the spring force, when the steel ball 10 is placed in the down-hole hammer liquid flow channel 6, the down-hammer liquid flow channel 6 is closed, the down the cylindrical channel is opened, the water flow channel is formed by the water jet channel and the hydraulic jet channel is prevented from the hydraulic jet channel 7, and the hydraulic jet valve is mounted through the hydraulic nozzle, and the hydraulic valve hole 7, when the hydraulic valve is the hydraulic sealing hole and the hydraulic valve is mounted, and the performance is the valve is prevented from the working, and the hole.
The specific switching process of the water jet channel 4 and the down-the-hole hammer liquid flow channel 6 is as follows: as shown in fig. 1, when the drilling work is performed, the steel ball 10 is not put into, and liquid flows sequentially through the center liquid flow channel of the upper side of the upper drill rod, the center liquid flow channel of the upper end of the outer pipe 1 and the liquid flow channel 6 of the down-the-hole hammer into the hydraulic down-the-hole hammer below, and the hydraulic down-the-hole hammer normally works and drills, at the moment, the water jet channel 4 in the pipe wall of the outer pipe 1 is closed through the upper end of the valve seat 8 matched with the sealing ring 7, so that when the steel ball 10 is not put into, the water flow is blocked by the upper part of the valve seat 8. As shown in fig. 2, when the drilling is finished and a new down-hole hammer bit needs to be replaced, the steel ball 10 is put into the center flow channel of the upper drill rod, the ground water pump is turned on, the steel ball 10 is adjusted to work with proper low flow, the steel ball moves downwards along the center flow channel of the drill rod under the action of gravity and water power, finally is clamped in the down-hole hammer flow channel 6 of the valve seat 8, the water pump pressure gauge is observed in real time, the flow rate can be gradually increased when the pressure of the water pump pressure gauge rises rapidly, and the steel ball 10 presses the valve seat 8 under the action of water pressure, so that the down-hole hammer flow channel 6 is cut off. The water pressure continuously increases, the steel ball 10 and the valve seat 8 are pushed to downwards compress the spring 9, the water jet channel 4 is finally opened along with the gradual increase of the downward displacement, the drilling fluid forms high-speed water jet through the nozzle 3 to break the rock on the hole wall, and the reaming operation is realized.
The working principle of the dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device provided by the invention is as follows: dry hot rock drilling formations are mostly granite with high abrasiveness and poor drillability. During the drilling process of the hydraulic down-the-hole hammer, the edge teeth of the drill bit are gradually worn, so that the diameter of the drill bit is gradually reduced, and after the drill bit fails and the drill bit with the same diameter is replaced, a new drill bit cannot be put in due to the reduced diameter of the drill bit. The research shows that a large number of microcracks and micro-cracks exist in the granite well wall after the hydraulic down-the-hole hammer impacts the rotary drilling, the surface layer of the well wall can be scored by a knife, and the difficulty of rock breaking on the surface layer of the well wall is greatly reduced. By implementing the technical scheme, in the process of drilling, lifting and replacing the drill bit of the hydraulic down-the-hole hammer, the down-the-hole hammer flow channel 6 is closed by throwing the steel ball 10, meanwhile, the water jet channel 4 in the pipe wall of the outer pipe 1 is opened, high-speed water jet is used for breaking hole wall rock, the reaming operation is realized, the roller bit is not required to be used for reaming again after the new drill bit is replaced, the processes of one-time drilling reaming and lifting are omitted, particularly for deep wells and ultra-deep wells, a great amount of time cost and drilling cost are saved, and the drilling efficiency of dry rock is improved.
The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a dry hot rock high energy hydraulic down-the-hole hammer sprays reaming device which characterized in that includes: the hydraulic down-the-hole hammer comprises an outer tube, an elastic retainer ring, a nozzle, a water jet channel, a nozzle sleeve, a down-the-hole hammer flow channel, a valve seat, a spring and a steel ball, wherein the upper end of the outer tube is connected with a drill rod through threads; the central axis of the water jet channel coincides with the central axis of the threaded hole, the water jet channel and the threaded hole are arranged obliquely upwards, and the included angle between the central axes of the water jet channel and the threaded hole and the central axis of the outer tube is 20-80 degrees; the nozzle sleeve is fixedly arranged in the threaded hole through threaded connection, the nozzle sleeve and the threaded hole are coaxially arranged, and a conical spray hole with the sectional area gradually increased along the water flow direction is formed in the nozzle sleeve; the nozzle is arranged in the nozzle sleeve, the nozzle and the nozzle sleeve are coaxially arranged, and an inner channel of the nozzle, the water jet channel and the conical spray hole arranged on the nozzle sleeve are mutually communicated; the spring is arranged in the central liquid flow channel of the outer tube, and the lower end of the spring is abutted against an inner shoulder positioned at the lower part of the outer tube; the elastic retainer ring is arranged at the upper part of the side wall of the outer tube central liquid flow channel; the valve seat is arranged in the outer tube central liquid flow channel, the bottom end surface of the valve seat is in contact with the upper end surface of the spring, a down-the-hole hammer liquid flow channel which axially penetrates through the valve seat is arranged in the valve seat, the down-the-hole hammer liquid flow channel is of a variable diameter structure and is divided into three sections along the drilling fluid flow direction down-the-hole hammer liquid flow channel, the first section is a cylindrical channel with the inner diameter larger than the diameter of the steel ball, the second section is a conical frustum-shaped channel with the inner diameter gradually reduced along the drilling fluid flow direction, and the third section is a cylindrical channel with the inner diameter smaller than the diameter of the steel ball;
the steel ball is used for controlling the switch of the water jet channel and the down-the-hole hammer flow channel, when the steel ball is not placed in the down-the-hole hammer flow channel, the upper end surface of the valve seat is propped against the elastic retaining ring, the drill rod, the outer tube and the central flow channel of the hydraulic down-the-hole hammer are communicated with each other, the water jet channel is blocked at the upper part of the valve seat, and the water jet channel is closed;
the steel ball is placed in a down-the-hole hammer flow channel, the down-the-hole hammer flow channel is closed, and the water jet flow channel is opened;
a shrinkage accelerating section and a stable jet section are formed in the nozzle, and the shrinkage accelerating section is provided with a conical hole with gradually reduced sectional area along the water jet direction;
the initial speed of the water jet outlet of the nozzle is 50 m/s-150 m/s;
the inner hole of the threaded hole is of a stepped structure, the inner wall of the nozzle sleeve is of a stepped structure, the nozzle and the nozzle sleeve are both provided with an inner end face and an outer end face, the inner end face close to the central axis of the outer tube is an inner end face, the outer end face of the nozzle is propped against the inner shoulder of the nozzle sleeve, the inner end face of the nozzle is propped against the inner shoulder of the threaded hole, and the outer end face of the nozzle sleeve is provided with an inner hexagonal hole.
2. The device for jetting and reaming a dry and hot rock high-energy hydraulic down-the-hole hammer of claim 1, wherein the number of the water jet channels and the threaded holes is at least three, and the water jet channels and the threaded holes are uniformly distributed at intervals around the central axis of the outer tube.
3. The device for jetting and reaming a dry-hot rock high-energy hydraulic down-the-hole hammer of claim 1, wherein the outer side of the nozzle sleeve is provided with external threads, and the threaded hole in the outer pipe wall is an internal thread matched with the external threads.
4. The device for jetting and reaming a dry and hot rock high-energy hydraulic down-the-hole hammer of claim 1, wherein a sealing ring is arranged between the nozzle and the nozzle sleeve.
5. The device for jetting and reaming a dry-hot rock high-energy hydraulic down-the-hole hammer of claim 1, wherein the jet hole of the nozzle is 5-15 mm away from the rock of the well wall.
6. The device for jetting and reaming a dry and hot rock high energy hydraulic down-the-hole hammer of claim 1, wherein an annular sealing ring is mounted on each of the upper and lower outer portions of the valve seat.
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| CN201910720828.7A CN110318677B (en) | 2019-08-06 | 2019-08-06 | Dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device |
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| CN201910720828.7A CN110318677B (en) | 2019-08-06 | 2019-08-06 | Dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device |
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| CN110318677B true CN110318677B (en) | 2023-12-19 |
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| CN112227985B (en) * | 2020-10-12 | 2021-10-22 | 中国科学院武汉岩土力学研究所 | Ultra-deep salt mine butt-joint well bittern-mining full-horizontal-section groove expanding method |
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| AU6673286A (en) * | 1985-12-19 | 1987-06-25 | Ben Wade Oakes Dickinson Iii | Mechanically actuated whipstock assembly |
| CN2304748Y (en) * | 1997-07-24 | 1999-01-20 | 辽河石油勘探局钻采工艺研究院 | Underground borer of high pressure jet well |
| CN101457640A (en) * | 2007-12-14 | 2009-06-17 | 中国石油大学(北京) | Abradant jet downhole perforation, kerf multiple fracturing method and device |
| CN102337840A (en) * | 2011-09-19 | 2012-02-01 | 中国矿业大学 | Self-guiding water pressure-switching cutting type broaching drill bit |
| CN102966304A (en) * | 2012-11-28 | 2013-03-13 | 吉林大学 | Mud retaining wall and air down-the-hole hammer drilling tool and drilling technology |
| CN104405292A (en) * | 2014-11-03 | 2015-03-11 | 中国石油大学(北京) | Double-wall drill pipe countercirculation well drilling fixed guide impeller type rotational flow and jet flow pump drill bit |
| CN105089500A (en) * | 2015-09-11 | 2015-11-25 | 重庆大学 | Coal mine downhole hydraulic jet tree-shaped drill hole way-type drilling unit |
| CN107795282A (en) * | 2017-11-21 | 2018-03-13 | 中南大学 | Double control road pulsing jet button bit |
| CN207538788U (en) * | 2017-11-27 | 2018-06-26 | 西南石油大学 | A kind of tag activation formula reaming hole device |
| CN108166933A (en) * | 2018-02-07 | 2018-06-15 | 吉林大学 | Jet stream cold cracking formula hot dry rock down-hole hammer drilling |
| CN109083594A (en) * | 2018-08-17 | 2018-12-25 | 中煤科工集团重庆研究院有限公司 | The adjustable drilling apparatus in coal seam waterpower direction |
| CN210289632U (en) * | 2019-08-06 | 2020-04-10 | 吉林大学 | High-energy hydraulic down-the-hole hammer jet reaming device for hot dry rock |
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